AC Installation in Mableton, GA
A new air conditioner in Mableton will run from May through September every year. Tell us about the house, and a licensed contractor who covers Cobb County will get in touch.
Tell us about the job
It takes about a minute.
Five months of Georgia heat, and storms in between
Your air conditioner runs from May through September here, with summer afternoons averaging 88°F. That is five straight months where the system has to keep up, day after day, not just a few hot spells.
Cobb County has also seen 70 damaging wind events and 22 hail events over the past ten years, with hail up to 1.75 inches. The outdoor unit sits exposed to that. If you're installing new, anything built since 2023 has to meet at least 14.3 SEER2, the federal efficiency minimum for central air.
- 5 months
- May through September, your air conditioner is on duty
- 88°F
- the average summer afternoon it cools against
- 22 hail events
- in ten years, and hail bends the fins on outdoor coils
- 13.4 SEER2
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Going above the federal minimum saves little here, about $20 a year.
Estimates for a typical Cobb County home, from EIA household energy data, Georgia fuel prices and NOAA climate normals. Your home will differ.
Georgia requires HVAC contractors to hold a state license.
Georgia's license is issued through the State Construction Industry Licensing Board, and it covers the contractor, not the job in front of you. It stays with the person or company, not with this one installation.
For the install itself, most cities and counties in Georgia also require a permit from the local building office, with an inspection once the work is finished. That inspection is where someone besides the contractor checks what got installed. Between the state license and the local permit, this job has the contractor accountable for holding a license, and the building office checking the work itself.
Source: Georgia Secretary of State
- What size air conditioner does my house need?
- There is no set answer without a load calculation done for your house. A contractor figures this by looking at your square footage, insulation, window placement and how much shade your house gets, not just square footage alone. Putting in a unit that is too big cools the air fast but shuts off before it pulls the moisture out, so the house feels clammy. Too small, and it runs constantly through those summer afternoons here without ever catching up. A contractor can run the calculation and size it to your house.
- Should I replace the whole system or just the outdoor unit?
- In most cases replacing just the outdoor unit is not a good idea. The outdoor and indoor units are matched to work together, and pairing a new outdoor unit with an old indoor coil often means you lose efficiency and put strain on the new equipment. If your indoor coil is old, a mismatch can also shorten the life of the new unit. A contractor can look at the age and condition of both parts and tell you whether the indoor coil is worth keeping or should go at the same time.
- Do HVAC contractors in Mableton need a state license to work on my home?
- Yes. Georgia requires HVAC contractors to hold a state license, issued by the State Construction Industry Licensing Board. Asking to see that license before work starts is reasonable, and any licensed contractor should be able to show it to you.